Metadatos

Autor

Área de conocimiento

Producción Vegetal

Patrocinadores

This research has been supported by the projects SIRRIMED (KBBE-2009-1-2-3, Proposal No. 245159), SENECA (05665/PI/07 and 11872/PI/09), CONSOLIDER INGENIO 2010 (CSD2006-0067MEC) and CICYT (AGL2010-17553). C. Romero-Trigueros
acknowledges the financial support received from CSIC program JAE.

Revisión por pares

Palabras clave

Resumen

Citrus trees are strongly affected by salinity, especially in countries where irrigation is required as a semi-arid
Mediterranean agronomic region. The aims of the study were i) to identify the best reliable plant-based water status
indicator for field grown grapefruit trees irrigated with saline reclaimed water during five years of cultivation by
measuring seasonal changes in physiological parameters (i.e. gas exchange and stem water potential measurements),
leaf structural traits (i.e. leaf chlorophyll content, area-based leaf nitrogen and area-based dry mass), phytotoxic
elements and yield; ii) to estimate phytotoxicity thresholds at leaf level. Our results showed that the chlorophyll content
was the parameter with the highest number of measures with significant differences (p ≤ 0.05, ANOVA) between trees
irrigated with reclaimed water and control trees throughout growing stages. Moreover, Chl a increased linearly with
area-based leaf nitrogen (R2 = 0.63; p < 0.001) and ...